2000
Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids
ŠIBOR, Jiří a Pavel PAZDERAZákladní údaje
Originální název
Thermal Behaviour of Esters and Nitriles 2-(3-Acylselenoureido)benzoic and 2-(3-Acylselenoureido)thiophene-3-carboxylic Acids
Autoři
ŠIBOR, Jiří a Pavel PAZDERA
Vydání
Chem. Papers, Bratislava, Slovak Republic, Slovak Academy of Science, 2000, 0366-6352
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10401 Organic chemistry
Stát vydavatele
Slovensko
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 0.154
Kód RIV
RIV/00216224:14310/00:00001932
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000086602800006
Klíčová slova anglicky
thermal behaviour of esters and nitriles;
Změněno: 26. 3. 2015 16:01, Dana Nesnídalová
Anotace
V originále
The thermally initiated transformation of esters and nitriles of 2-(3-acylselenoureido)benzoic and 2-(3-acylselenoureido)thiophene-3-carboxylic acids under heating without solvent to the temperature ca. 300 degrees C was studied. The thermal behaviour was studied by methods of the thermal analysis. It was found that selenoureas in ester series afford isoselenoureas at the temperature lower than their melting points. This change occurs in the solid state as an exothermic process. The next exothermic change starts by the following increase in temperature. Two molecules of isoselenoureas eliminate one hydrogen molecule by air oxygen action. The oxidation is connected with Se-Se bond formation and diselenides are formed. Nitriles undergo a transformation to di(2-pyrimidyl)diselenides in the course of several steps in melt in the presence of air oxygen.
Návaznosti
| MSM 143100011, záměr |
|